Cast car spoiler

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Cast car spoiler

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johan holm	johan holm posted 4 Years Ago HOT Topic Details
Group: Forum Members Posts: 6, Visits: 125	Hello I want to cast a small spoiler for the trunk of my car and thought to do it in polyurethane Which polyurethane should I cast the final spoiler in? I thought I would make the mold in silicone
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Warren (Staff)	Warren (Staff) posted 4 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 7.9K	Depends how thick you want to make it? Solid PU for anything of any substance, other than a small lip spoiler, would be quite heavy and may need a couple of pours to avoid overheating and shrinkage. However a typical small lip spoiler, (20mm by 20mm triangle type shape) can be done in any Fast Cast PU such as our Xencast P2 Fast Cast Polyurethane Casting Resin. I would add some milled carbon fibre for strength then you can paint it once done and bond it into place. No problem with a silicone mould, just ensure it has a nice support box around it so you know the resulting cast is straight and true relative to the boot lid edge. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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johan holm	johan holm posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 6, Visits: 125	+x Warren (Staff) - 9/7/2020 4:02:50 PM Depends how thick you want to make it? Solid PU for anything of any substance, other than a small lip spoiler, would be quite heavy and may need a couple of pours to avoid overheating and shrinkage. However a typical small lip spoiler, (20mm by 20mm triangle type shape) can be done in any Fast Cast PU such as our Xencast P2 Fast Cast Polyurethane Casting Resin. I would add some milled carbon fibre for strength then you can paint it once done and bond it into place. No problem with a silicone mould, just ensure it has a nice support box around it so you know the resulting cast is straight and true relative to the boot lid edge. The idea is that it should be hollow without a bottom and 2-3mm thick Something like this https://www.amazon.com/06-12-Lexus-IS250-IS350-Spoiler/dp/B00K3YFL66 I plan to make a 2 piece silicone mold with one part as the whole outside then the other part as a bottom and insert with injection holes and some air drainage holes Is it possible to inject polyurethane with a 2 component pump like this that has a mixing nozzle? https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F163668849571 Best Regards
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Warren (Staff)	Warren (Staff) posted 4 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 7.9K	The pot life of most fast cast PU's is going to be too short to use a machine like that. Just ensure your mould has good vent holes and you should be fine. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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johan holm	johan holm posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 6, Visits: 125	+x Warren (Staff) - 9/8/2020 3:55:03 PM The pot life of most fast cast PU's is going to be too short to use a machine like that. Just ensure your mould has good vent holes and you should be fine. The machine I linked to has 2 separate containers one for part A and one for part B and then they are mixed together 50/50 in the nozzle. Can it work on, for example, Xencast P2 Fast Cast Polyureth
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Warren (Staff)	Warren (Staff) posted 4 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 7.9K	You'd have to try it. These resins have not been tested in automated machines like that. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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johan holm	johan holm posted 4 Years Ago HOT Post Details
Group: Forum Members Posts: 6, Visits: 125	+x Warren (Staff) - 9/11/2020 8:39:26 AM You'd have to try it. These resins have not been tested in automated machines like that. It worked well to make my roof spoiler Now the next project is 2 small front lips I thought I would make a 2 piece mold in fiberglass and that the final product would be 3-4 mm thick as the original bumper Which polyurethane may be suitable? It needs to be more durable than the roof spoiler because it is located in a more exposed place The Xencast P2 Fast Cast becomes very hard, is there an alternative that is more flexible but can still be painted?
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Warren (Staff)	Warren (Staff) posted 4 Years Ago HOT Post Details
Group: Administrators Posts: 2.5K, Visits: 7.9K	Excellent! Glad it worked well. As an alternative but tougher, you could use the Xencast P6 Toughened Polyurethane Resin but it is a bit more moisture sensitive in mixing and a little bit less user friendly than the P2. You could add milled carbon to the P2 to make it tougher. Both resins can be painted. Warren Penalver Easy Composites / Carbon Mods - Technical Support Assistant
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